Docs: What's "a compatible array type"?

[mrmowji]

I think that'd be good if there's some explanation somewhere in C# docs.

---

Document Details

⚠ Do not edit this section. It is required for docs.microsoft.com ➟ GitHub issue linking.

• ID: b9770af4-de82-7034-a56b-c68a6b5c55e5
• Version Independent ID: 6bd64fcc-5c84-e541-12f4-0cdcfe4f5dd2
• Content: C# Types and Variables - A tour of the C# language
• Content Source: docs/csharp/tour-of-csharp/types-and-variables.md
• Product: dotnet-csharp
• Technology: csharp-get-started
• GitHub Login: @BillWagner
• Microsoft Alias: wiwagn

[BillWagner]

Thanks for pointing this out @mrmowji

Updating the tour of C# section is on our list of upcoming tasks. We'll address this as part of that work.

[ericlippert]

@mrmowji: To answer your question: C# allows unsafe array covariance in some cases. For example, a string[] reference may be stored in a variable of type object[] even though writing a non-string via the variable would crash. Also, the CLR allows references to int[] to be stored in a variable of type uint[], and similarly for other integral types.